Gun for applying adhesives to surfaces



y 7, 1968 R. H. STEIN 3,381,861

GUN FOR APPLYING ADHESIVES TO SURFACES Filed July 6, 1966 INVENTOR- ROYSTE/N ATTORNEY United States Patent 3,381,861 GUN FOR APPLYENG ADHESEVEST0 SURFACES Roy H. Stein, 3924) Zephyr St, Wheat Ridge, Colo. 80033Filed July 6, 1966, Ser. No. 563,180 4 Claims. (Cl. 222-256) ABSTRACT OFTHE DISCLOSURE A gun for applying adhesives to surfaces either in spacedapart Spots or in continuous strips on surfaces, provided with means forpreventing oozing of the compound out of the applicator orifices betweenspot applications and at the end of the applying operation. The guncomprises a hollow tube or casing, a compound cartridge releasablypositioned in the casing, a hollow elongated vertical handlecommunicating with the casing, a plunger tube slidable in the verticalhandle and a plunger rod slidable in the plunger tube, the plunger tubebeing accessible through the vertical handle, the rod being providedwith a horizontal handle on its upper end and a foot on its lower endextending into the compound cartridge. The gun includes means on thevertical handle and plunger tube for moving the tube downwardly so thefoot bears on the compound, and manually operable means for releasingthe plunger tube to prevent oozing of compound.

This invention relates to a gun for applying adhesive compounds tosurfaces such as floors, walls, roofs and the like for the purpose ofinstalling tile, linoleum, shingles and other surface coverings thereon.

The main object of the invention is to provide an applicator which issimple in construction and efiicient for applying adhesive or otherplastic compounds either in spaced apart spots or in continuous stripson a surface.

Another object is to provide means in the applicator for preventingoozing of the compound out of the ap plicator orifices between spotapplications and at the end of the adhesive applying operation.

Other objects and advantages of the invention will be apparent from thedrawings and following description.

In the drawings:

FIG. 1 is an elevational side view of an adhesive gun embodying myinvention.

FIG. 2 is a horizontal sectional view on an enlarged scale in the planeof the line 2-2 of FIG. 1.

FIG. 3 is a vertical sectional view, on an enlarged scale, of a portionof the apparatus shown in FIG. 1.

FIG. 4 is a transverse horizontal sectional view on an enlarged scale inthe plane of the line 44 of FIG. 1.

FIG. 5 is a vertical sectional view of the pump construction in theplane of the line 55 of FIG. 4.

FIG. 6 is a horizontal sectional view of the pump mechanism, in theplane of the line 66 of FIG. 5.

In the embodiment of the invention shown in the drawings, the adhesivegun or applicator comprises a semicylindrical hollow cartridgecontaining tube or casing 10 provided with a base plate 11 mounted by ahub 12 on a pipe nipple 13. A circular cap 14 is fixedly secured to theupper end of the tube 10, and the hub 15 of the top cap has mountedtherein by screw threads a pipe member 16.

The handle 17 is a hollow tubular member provided with a grip portion 18at its upper end and a housing 19 integral with its lower end. Thehousing 19 is connected to the upper threaded end of the pipe member 16.Extending longitudinally through the vertical portion of the handle 17,through the housing 19 and pipe member 16, is a slidable plunger tube 20which projects downwardly into the cartridge containing tube 10. Aplunger 3,381,861 Patented May 7, 1968 rod 21 with grip portion 22 isslidable within the plunger tube 20, the handle 17 and tube 20 beingprovided with a vertically extending slot 23 which permits the gripportion 22 to protrude from the slot when the plunger rod 21 is moved upor down.

The lower end of the plunger rod 21 has fixed thereon a plunger foot 24and a suction cup 25 located within the foot 24. A plunger spring 26 iscoiled about the plunger rod 21 and bears at opposite ends on the foot24 and the plunger tube 20. A fiat bottom flanged circular dish shapedmember 27 rests on the adhesive or other compound 28 in a cartridge 29which fits within the semicylindrical tube 10.

The cartridge 29 is clamped into place within the tube 10 by a cartridgehold-down rod 30 with clip 31 and hold-down spring 32 in bracket 33 ontube 10, the clip bearing on the upper edge of the cartridge 29 as shownin FIG. 3.

Within the housing 19 is a plunger release member 35 provided with aninner end 36 and an outer end 37. The inner end 36 engages a notch 38 inthe housing wall. The plunger release member 35 is apertured to fitaround the plunger tube 20 to clamp the tube while the member 35 is inunreleased position. The outer end 37 extends beyond the housing 19 formanual release of the member 35. A plunger rod feed washer 39 is mountedon the plunger tube 20 and retained between coils of a plunger feedspring 40. The washer 39 serves as a holding clamp on the plunger tube20. The upper end of the spring 40 bears against the plunger releasemember 35 and the lower end bears on the bottom of the housing 19.

A plunger lever 41 having an inner end 42 is pivotally mounted near saidend on a pin 43 in the housing 19, with the end 42 bearing on the feedwasher 39. A rigid grip arm 44 projects from the handle 17 above thelever 41 for cooperation with the lever.

The pipe 13 communicates with the interior of the cartridge 29 forpassage of the compound 28 through the pipe 13 into a metering pump 45.A wheel 46 supports the pump and functions to actuate the pump vanes todispense a predetermined amount of the compound 28. The compound 28passes through the pump to an orificed tabber shoe 47 which may beshaped to apply compound to spaced apart spots or to continuous stripson a surface. The tabber shoe is mounted in the pump by a pin 48. Ashield 49 is mounted on the shoe 47 between its applicator end and thepump 45. The construction of the pump may vary as desired for applyingcompound at spaced locations or in continuous strip.

The operation of the device is as follows: The plunger rod 21 is raisedto the FIG. 1 position and then a cartridge 29 containing adhesive orother compound is placed on the base plate 11 through the open side ofthe semi-cylindrical tube 10, and is firmly held in position therein bythe clip 31 of the clamping rod 30 bearing on the upper edge of thecartridge. The dish shaped follower 27 is placed on top of the compound28 in the cartridge. Plunger rod is pushed down to top of compound incartridge. The lever 41 is manipulated by gripping the lever and therigid grip member 44 above it, and squeezing the lever toward the gripmember as needed to cause the lever end 42 to bear down on the washer 39and spring 40, thereby moving the plunger tube 20 and plunger rod 21downwardly and causing the plunger foot 24 to bear on the dish member 27to press the compound down into the applicator pump.

To stop the flow of material through the pump between applications or atthe end of the operation, the operator depresses the plunger releasemember 35 by bearing down on the end 37. This releases the hold of themember 35 on the plunger tube 20, and due to the expansible urging ofthe spring 26, the suction cup 25 and foot 24 together with the plungerrod 21 and tube 20 are raised, thereby relieving pressure on thecompound and stopping the flow of material and any tendency to ooze outthrough the applicator shoe.

The vanes 50 in the pump may be located to cause the shoe 47 to dispensesmall daubs of the compound every six inches, for example, as desi'ed,but this construction may be varied for different applications. Thewheel 46 on pump shaft 51 rotates the pump mechanism as the wheeltravels over a surface, and thus controls the placement of adhesivematerial where desired.

Changes may be made in details of construction and arrangement of partswithout departing from the scope of the invention as defined by theappended claims.

I claim:

1. An adhesive gun for applying compounds to surfaces comprising (a) ahollow open sided casing having an apertured base plate and an aperturedtop cap spaced from the base plate,

(b) a compound container releasably positioned in the casing on saidbase plate,

(c) a hollow elongated slotted vertical handle communicating with thecasing,

(d) a plunger tube slidable in the handle extending from the upper endof the handle downwardly through the top cap into the compoundcontainer, said tube being slotted in register with the slot in thevertical handle,

(e) a plunger rod slidable in the plunger tube, said rod being providedwith a handle on its upper end projecting from the plunger tube to slidein the slots of the tube and vertical handle, said rod extendingdownwardly into the compound container.

(f) a foot on the plunger rod for bearing on compound in the container,

(g) manually operable cooperating means on the vertical handle andplunger tube accessible through the handle for moving the plunger tubeand plunger rod downwardly and causing the plunger foot to presscompound out of the container,

(h) a metering pump connected to the casing in communication with thecompound container, and

(i) an orificed dispenser shoe on the pump for applying compound to asurface,

2. The adhesive gun defined by claim 1, in which the manually operablecooperating means on the vertical handle and plunger tube include ahollow housing formed in the vertical handle, a plunger release platemounted on the plunger tube in said housing, said plate having one endpivotally mounted in the housing and a free end projecting from thehousing, and resilient means normally holding the plunger release platein unreleased position on the plunger tube.

3. The adhesive gun defined by claim 1, in which the means on the handleand on the plunger tube for moving the plunger tube and plunger roddownwardly comprises a clamping washer on the plunger tube and apivotally mounted lever on the handle, actuation of the lever causingthe lever to bear on the clamping washer to move the plunger tube androd downwardly.

4. The adhesive gun defined by claim 1, which includes a plunger releaseplate tiltably mounted in the handle and having a free end, said plateengaging and clamping the plunger tube, a coiled spring on the plungertube normally holding the release plate in clamping position, depressionof the free end of the release plate serving to release its hold on theplunger tube and to thereby relieve pressure by the plunger rod foot onthe compound to prevent oozing of the compound through the pump shoeorifices.

References Cited UNITED STATES PATENTS 1,737,783 12/1929 Butler 222-2561,894,274 1/1933 Jacques 222-256 2,070,206 2/1937 Hudson 222327 X2,350,683 6/1944 Jossim et al. 103-161 2,602,570 7/ 1952 Sherbondy222-327 3,070,263 12/1962 McMullen 222--177 3,211,103 10/ 1965Kiekhaefer 103 117 ROBERT B. REEVES, Primary Examiner.

N. L. STACK, Assistant Examiner.

